diff --git a/setup.sh b/setup.sh
index e941f6f..9a85c3b 100644
--- a/setup.sh
+++ b/setup.sh
@@ -122,8 +122,13 @@ echo "📡 Installing and configuring WiFi hotspot and captive portal..."
 
 if [ "$PKG_MANAGER" == "apt" ]; then
     # Install dependencies for hotspot and for building nodogsplash
-    sudo apt install -y hostapd dnsmasq git libmicrohttpd-dev libjson-c-dev
+    sudo apt install -y hostapd dnsmasq git libmicrohttpd-dev libjson-c-dev iptables
     
+    # Force iptables-legacy for nodogsplash compatibility
+    echo "Setting iptables-legacy mode for nodogsplash..."
+    sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
+    sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
+
     echo "Building and installing nodogsplash from source..."
     # Create a temporary directory for the build
     BUILD_DIR=$(mktemp -d)